// The height and width of your custom header. You can hook into the theme’s own filters to change these values.
// Add a filter to bp_dtheme_header_image_width and bp_dtheme_header_image_height to change these values.
define( ‘HEADER_IMAGE_WIDTH’, apply_filters( ‘bp_dtheme_header_image_width’, 1250 ) );
define( ‘HEADER_IMAGE_HEIGHT’, apply_filters( ‘bp_dtheme_header_image_height’, 133 ) );

// We’ll be using post thumbnails for custom header images on posts and pages. We want them to be 1250 pixels wide by 133 pixels tall.
// Larger images will be auto-cropped to fit, smaller ones will be ignored.
set_post_thumbnail_size( HEADER_IMAGE_WIDTH, HEADER_IMAGE_HEIGHT, true );

// Add a way for the custom header to be styled in the admin panel that controls custom headers.
add_custom_image_header( ‘bp_dtheme_header_style’, ‘bp_dtheme_admin_header_style’ );
} */`

Because of this, whenever I create a post with a gallery in it, then select an image as the featured image, the image appears in my theme header. I don’t want this to happen.

I’ve found I can fix the problem by editing out this code in functions.php. But obviously this is not a long-term solution.

Ideally I need to add some code to the functions.php in my custom theme to disable it. But, despite having tried a few likely-looking solutions I found in the forum, nothing so far has worked.